Through criticism of contemporary scholars on Guo Xiang's commentary of Zhuangzi, this article aims to reflect on the possibility to apply Guo Xing's theory of Essentialism or Ontology. To use the words "tzu sheng" to explain the words "natural" is not based on an external and objective principle nor internal and subjective consciousness. "Tzu Sheng" is referred as the differences between every defined subjects, in the everyday world, it becomes a continuously changing relationship through the interaction with each other. Guo Xiang claims that every beings has very distinctive differences called "Xing feng" by its nature, however this very distinction between every beings becomes the limitation of every existence which can not be identical with the others. Only through the cultivation in the practice of "Du Hua into the Hsuan Ming", which refers to willingly throw into the present beings and flow of Being, every being of "Xing Feng", then can be fully realized to perfection in order to create the harmony world.